The mother of a teenage boy murdered in the New Zealand mosque massacre was on the phone with him when he was shot dead, she said in a report Sunday.

Hamza Mustafa, 16, had been praying at the Masjid Al Noor mosque Friday with his father and younger brother, and called his mother moments after the gunman opened fire.

“He said: ‘Mum, there’s someone come into the mosque and he’s shooting us’ and he was running with his brother who had been shot in the leg,” the grief-stricken mother, Salwa Mustafa, recalled to Stuff.NZ.

“After that, I heard shooting and he screamed and after that I didn’t hear him,” she continued. “I called, ‘Hamza, Hamza,’ and I can hear his little voice and after that it was quiet.”

She kept trying to reach her son for the next 22 minutes.

“His phone was on, but I couldn’t talk to him, after that someone picked up the phone and told me your son can’t breathe, I think he’s dead.”